Silicon Nitride Coated Implants for Bone Integration
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Solution Overview
Problem
Current bone implants for spinal surgeries lack osteo-inductive properties, often leading to non-unions, infections, and complications such as malalignment and delayed union or nonunion, due to materials that do not induce significant bone growth and provide inadequate anti-bacterial properties.
Innovation Solution
Incorporating silicon nitride (Si3N4) into implant materials and bone cements, which are osteo-inductive and osteo-conductive, promoting bone fixation while reducing bacterial adhesion and infection, combined with other materials like titanium, PEEK, and polyurethane foams for enhanced strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional implant materials are used, then mechanical strength is achieved, but bone growth induction is insufficient
Solution Approach 1:
The patent employs composite materials combining titanium (for mechanical strength) with silicon nitride particles (for osteo-inductive properties). This composite approach allows the implant to simultaneously achieve structural integrity and biological activity, resolving the contradiction between mechanical strength and bone growth induction capability
Solution Approach 2:
The implant surface is treated with selective silicon nitride coating and porous structure creation, concentrating osteo-inductive properties at the bone-contacting surfaces while maintaining structural integrity in load-bearing regions. This local differentiation resolves the contradiction by providing strength where needed and bone growth induction where biologically required
2Stability of the object's composition
If traditional implant materials are used, then structural integrity is maintained, but anti-bacterial properties are inadequate
Solution Approach 1:
The patent modifies the chemical composition parameters of the implant material by incorporating silicon nitride, which fundamentally changes the surface properties to exhibit inherent anti-bacterial characteristics. This parameter change maintains structural integrity while adding protective anti-bacterial functionality
Solution Approach 2:
The silicon nitride coating provides self-service anti-bacterial protection through its inherent chemical properties that prevent bacterial adhesion and promote biofilm formation resistance, eliminating the need for additional antibacterial agents or complex surface treatments
3Force
If bone cement is used for fixation, then initial stability is achieved, but osteo-inductive properties are lacking
Solution Approach 1:
The bone cement is formulated as a composite material combining PMMA base with silicon nitride particles and resorbable granules. This composite structure provides both mechanical fixation stability and osteo-inductive biological activity, resolving the contradiction between initial stability and bone growth promotion
Solution Approach 2:
The bone cement incorporates porous structures and resorbable granules that create pathways for bone ingrowth while maintaining initial mechanical stability. The porous architecture allows osteo-inductive factors to penetrate and stimulate bone formation while the cement matrix provides immediate fixation strength
Data Source
AI summary
Disclosed are devices, systems and related surgical methods including implantable devices having a plurality of osteo-inductive, osteoconductive and/or osseointegrative surface features that may be useful in joint and/or bone replacement implants used in spinal surgeries, dental surgeries and/or other orthopedic and/or general surgical procedures.